Automatic air-supply control for internal-combustion engines



I. B. ADLER AND T. F. GEHLE.

AUTOMATIC AIR SUPPLY CONTROL FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JULY 30, I92].

Patented Apr. 18, 1922.

Wm Mfr-mam a ring sleeved upon the UNITED STATES JOHN B. ADLER AND THEODORE F.

ATENT, creme.

GEHLE, OF DEARBORN, MICHIGAN.

App1ieation filed July 30,

T00 whom it may concern:

Be it known that we, JoHN B. ADLER and THEODORE F. GEHLE, both citizens of the United States of America, residing at Dearborn, in the 'county of Wayne and State of Michigan, have invented certain new and useful Improvements in Automatic Air- Supply Controls for Internal-Combustion Engines, of which the following is a specifi-.

cation, reference being had therein to the accompanying drawings. e

The invention relates to controlling devices for the air supply to internal combustion engines and it is the object of the invention to obtain a better operation and economy in the use of fuel. To this end the invention consists in the construction as hereinafter set forth.

In the drawings:

Figure 1 is an elevation showing a portion of the intake of an internal combustion engine with our improvement attached thereto;

igure 2 is a perspective view of thev attachment;

Figure 3 is an thereof; and b Figure 4 is a longitudinal section. A 1s the intak manifold of an internal enlarged cross-section combustion engine, B the carburetor attached thereto, and C the intake pipe to the carburetor which may,if desired, be provided w1th an air warming device (not shown). D is a cylindrical casing which is insertable in the intake C at a point adjacent to its connection to the carburetor. Within this casing is arranged a pair of complementary segmental valves E and E which normally completely close the cross-section but which are yieldable to permit the passage of air. The valves in their normal position resting against stops F and F and are yieldably held thereagainst by a spring G. As shown, the valves are mounted upon a central pin H to-which they are secured by hinged eyes I. The spring G is preferably a torsional pin H and having arms J and J extendingE oppositely and bearing against the valves and E to press the same against the stops F and F.

With the construction as thus far described whenever the e 'ne is in operation, the valves F and F wil b' opened to a degree corresponding to the adjustment of the throttle. Thus if the engine is idling, the valves will remain nearly closed, but

Specification of Letters Patent.

1921. Serial to. 488,743.

" when the throttle is open, the higher vacuum carrled down to the valves F and F will a open th same to a greater degree, admitting a correspondingly larger volume of air. By properly adjusting the tension of the spring any desired efiect may be produced, but a still better operation pound spring, brought into action. Thus, as shown in Flgures 3 and 4, in addition to the spring G there is" provided a second sprin G sleeved upon the pin H, butthe arms I and K of this spring do not. initially bear against the valves Fand F. .ever, said valves are opened beyond apredetermined angle; they will be brought into contact with said arms K and K and-the tension of the spring G will be added to that of the spring G. I

In use, when the throttle is'closed to idling position the valves E and E will close correspondingly and the vacuum of the manifold is transmitted to the carburetor so as to insure a proper amount of fuel. On the other hand, as the throttle is opened, the valves F and F to supply the additional amount of air required.

What we claim as our invention is,--

1. The com 'nation with theintake-of an internal com ustion engine and a carburetor attached thereto, ofmeans controlling the air inlet to said carburetor comprising a cylindrical casing or sleeve, 2. pair of complementary hinged segments for completely closing the cross-sectional area of said sleeve, means for yieldably resisting the initial opening movement of said segments, and additional resistance means for yieldably operating against the further opening movement of said segments. I

2. The combination with the intake of an internal combustion engine and a carburetor attached thereto, of means for controlling the air inlet to said carburetor comprising a cylindrical casing or sleeve, a pair of complementary hinged segments for completely closing the cross-sectional area of said sleeve, a pin to which said segments are-hinged, stops for limiting the movement of said segments in an outward direction and a plurality of torsional springs sleeved on said pin, one of said springs resisting the initial opening movement of said segments and another of said springs being in- Patented Apr. 18,1922.

is obtained by a comthe elements of which are When, howwill correspondingly open cylindrical casing or sleeve, a pair of com plementary segments for completely closing 10 the cross-sectional area of said sleeve, a pin to which said segments are hinged, stops 61 limiting the movement of said se ents in an outward direction, and a plurality of torsional springs sleeved on said pin and successively engageable with said segments to variably resist the opening thereof.

In testimony whereof We afiix our signatures.

JOHN B. ADLER. THEODORE F. GEHLE. 

